Fireproof compound.



UNITED STATES Patented August 4, 1903.

PATENT OFFICE.

FIREPROOF COMPOUND.

SPECIFICATION forming part of Letters Patent No. 735,155, dated August4, 1903.

Application filed April 20,1903. Serial No. 153,550. (No specimens.)

To all whom it may concern:

Be it known that I, GUSTAF OSCAR RosEN- LEAF, a citizen of the UnitedStates, residing at Muscatine, in the county of Muscatine and State ofIowa, have invented a new and useful Fireproof Compound, of which thefollowing is a specification.

This invention relates to fireproof compounds for use in buildings.

The object of the invention is to provide a plastic compound of cheapcomposition which effectively resists the action of fire and which maybe used as filling for walls or as means for constructing the body-ofthe wall itself.

In preparing the compound the mode of procedure is as follows: Sawdustis first thoroughly moistened with water containing a quantity of bluevitriol or copper sulfate dissolved therein 171" the proportion of onepound of blue vitriol to every ten pounds of sawdust. The quantity ofwater used is just sufficient to thoroughly moisten the sawdust. Withthe moistened sawdust I then mix an equal quantity, by volume, of amixture consisting of equal parts of sand and any good cemepjprplaster.The moistened sawdustand themii'm ofsand an d plaster are thoroughlycommingled in any suitable apparatus, and when the mixing is completedthe plastic 0 mass is in condition for use.

- When used for filling walls, the studding is first boarded up on theoutside, and the building compound in the condition just described ispacked between the studding 5 against the boarding on the outer surfacethereof and pressed hard against the studding and boarding, so as tocompletely fill all the crevices of the wall. The inner surface of thewall is then boarded up over the filling 40 of plastic material. Thefilling of the wall is of course begun at the bottom, andthe boarding upof the inner surface of the wall is carried on simultaneously with thepacking in of the material between the studdin g in order to prevent theplastic material at the bottom from being forced outward by the weightof the material added above.

The boarding on the inner surface of the wall',while necessary duringthe filling process, may be removed after the plastic compound hassolidified, and the inner surface of the filling may then be finished inany desired manner.

If it is desired to form the wall entirely of the plastic material withthe exception of the studding, the mode of procedure is similar, exceptthat the boarding on the outside is only temporary and is to be removedafter the material has hardened. The outer surface is then finished offwith stucco or any other suitable form of surface plaster.

The walls made of my building compound are fireproof, are sufficientlyelastic not to crack, and are efiective in excluding cold. After thematerial has hardened it is unaffected by water and will take plasterwithout the use of laths thereon.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- 1. The composition of matter consistingof equal volumes of sawdust thoroughly moistened with the solution ofblue vitriol and a mixture containing sand and cement.

2. The composition of matter consisting of sand twenty-five per cent. byvolume, cement twenty-five per cent. by volume and sawdust moistened bya solution of blue vitriol fifty per cent. by volume.

3. The composition of matter consisting of equal volumes of sawdustmoistened with a solution of blue vitriol, containing one part of bluevitriol for ten parts of sawdust and a mixture containing equal parts byvolume, of sand and cement.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

GUSTAF OSCAR ROSENLEAF.

Witnesses:

JOHN W. RICHARDS, C. W. CHAPMAN.

